66205411 has 2 divisors, whose sum is σ = 66205412. Its totient is φ = 66205410.

The previous prime is 66205393. The next prime is 66205417. The reversal of 66205411 is 11450266.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66205411 - 2⁹ = 66204899 is a prime.

It is not a weakly prime, because it can be changed into another prime (66205417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33102705 + 33102706.

It is an arithmetic number, because the mean of its divisors is an integer number (33102706).

Almost surely, 2^66205411 is an apocalyptic number.

66205411 is a deficient number, since it is larger than the sum of its proper divisors (1).

66205411 is an equidigital number, since it uses as much as digits as its factorization.

66205411 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 66205411 is about 8136.6707565195. The cubic root of 66205411 is about 404.5428179481.

Adding to 66205411 its reverse (11450266), we get a palindrome (77655677).

The spelling of 66205411 in words is "sixty-six million, two hundred five thousand, four hundred eleven".